WP_Comments_List_Table
概述
WP_Comments_List_Table 是 WordPress 核心类，用于在管理后台以列表表格形式显示评论。它继承自 WP_List_Table，提供评论的筛选、排序、批量操作等功能。
关键要点
- 继承自 WP_List_Table，用于管理评论列表显示。
- 支持评论状态筛选（如待审、已批准、垃圾、回收站等）。
- 提供评论类型下拉菜单（如评论、Ping）进行过滤。
- 包含批量操作功能，如批准、不批准、标记为垃圾、删除等。
- 方法包括 prepare_items() 用于准备评论数据，get_columns() 定义列标题，handle_row_actions() 生成行操作链接。
- 使用钩子如 comments_list_table_query_args 和 comment_row_actions 进行自定义扩展。
代码示例
// 示例：使用 WP_Comments_List_Table 显示评论列表
$comments_table = new WP_Comments_List_Table();
$comments_table->prepare_items();
$comments_table->display();注意事项
- 确保用户有相应权限（如 edit_posts 或 moderate_comments）才能访问评论管理功能。
- 评论状态映射在 prepare_items() 方法中处理，需注意状态名称的一致性。
- 使用钩子时，遵循 WordPress 编码标准，避免直接修改核心类。
Core class used to implement displaying comments in a list table.
Description
See also
Methods
Source
class WP_Comments_List_Table extends WP_List_Table {
public $checkbox = true;
public $pending_count = array();
public $extra_items;
private $user_can;
/**
* Constructor.
*
* @since 3.1.0
*
* @see WP_List_Table::__construct() for more information on default arguments.
*
* @global int $post_id
*
* @param array $args An associative array of arguments.
*/
public function __construct( $args = array() ) {
global $post_id;
$post_id = isset( $_REQUEST['p'] ) ? absint( $_REQUEST['p'] ) : 0;
if ( get_option( 'show_avatars' ) ) {
add_filter( 'comment_author', array( $this, 'floated_admin_avatar' ), 10, 2 );
}
parent::__construct(
array(
'plural' => 'comments',
'singular' => 'comment',
'ajax' => true,
'screen' => isset( $args['screen'] ) ? $args['screen'] : null,
)
);
}
/**
* Adds avatars to comment author names.
*
* @since 3.1.0
*
* @param string $name Comment author name.
* @param int $comment_id Comment ID.
* @return string Avatar with the user name.
*/
public function floated_admin_avatar( $name, $comment_id ) {
$comment = get_comment( $comment_id );
$avatar = get_avatar( $comment, 32, 'mystery' );
return "$avatar $name";
}
/**
* @return bool
*/
public function ajax_user_can() {
return current_user_can( 'edit_posts' );
}
/**
* @global string $mode List table view mode.
* @global int $post_id
* @global string $comment_status
* @global string $comment_type
* @global string $search
*/
public function prepare_items() {
global $mode, $post_id, $comment_status, $comment_type, $search;
if ( ! empty( $_REQUEST['mode'] ) ) {
$mode = 'excerpt' === $_REQUEST['mode'] ? 'excerpt' : 'list';
set_user_setting( 'posts_list_mode', $mode );
} else {
$mode = get_user_setting( 'posts_list_mode', 'list' );
}
$comment_status = isset( $_REQUEST['comment_status'] ) ? $_REQUEST['comment_status'] : 'all';
if ( ! in_array( $comment_status, array( 'all', 'mine', 'moderated', 'approved', 'spam', 'trash' ), true ) ) {
$comment_status = 'all';
}
$comment_type = '';
if ( ! empty( $_REQUEST['comment_type'] ) && 'note' !== $_REQUEST['comment_type'] ) {
$comment_type = $_REQUEST['comment_type'];
}
$search = ( isset( $_REQUEST['s'] ) ) ? $_REQUEST['s'] : '';
$post_type = ( isset( $_REQUEST['post_type'] ) ) ? sanitize_key( $_REQUEST['post_type'] ) : '';
$user_id = ( isset( $_REQUEST['user_id'] ) ) ? $_REQUEST['user_id'] : '';
$orderby = ( isset( $_REQUEST['orderby'] ) ) ? $_REQUEST['orderby'] : '';
$order = ( isset( $_REQUEST['order'] ) ) ? $_REQUEST['order'] : '';
$comments_per_page = $this->get_per_page( $comment_status );
$doing_ajax = wp_doing_ajax();
if ( isset( $_REQUEST['number'] ) ) {
$number = (int) $_REQUEST['number'];
} else {
$number = $comments_per_page + min( 8, $comments_per_page ); // Grab a few extra.
}
$page = $this->get_pagenum();
if ( isset( $_REQUEST['start'] ) ) {
$start = $_REQUEST['start'];
} else {
$start = ( $page - 1 ) * $comments_per_page;
}
if ( $doing_ajax && isset( $_REQUEST['offset'] ) ) {
$start += $_REQUEST['offset'];
}
$status_map = array(
'mine' => '',
'moderated' => 'hold',
'approved' => 'approve',
'all' => '',
);
$args = array(
'status' => isset( $status_map[ $comment_status ] ) ? $status_map[ $comment_status ] : $comment_status,
'search' => $search,
'user_id' => $user_id,
'offset' => $start,
'number' => $number,
'post_id' => $post_id,
'type' => $comment_type,
'type__not_in' => array( 'note' ),
'orderby' => $orderby,
'order' => $order,
'post_type' => $post_type,
'update_comment_post_cache' => true,
);
/**
* Filters the arguments for the comment query in the comments list table.
*
* @since 5.1.0
*
* @param array $args An array of get_comments() arguments.
*/
$args = apply_filters( 'comments_list_table_query_args', $args );
$_comments = get_comments( $args );
if ( is_array( $_comments ) ) {
$this->items = array_slice( $_comments, 0, $comments_per_page );
$this->extra_items = array_slice( $_comments, $comments_per_page );
$_comment_post_ids = array_unique( wp_list_pluck( $_comments, 'comment_post_ID' ) );
$this->pending_count = get_pending_comments_num( $_comment_post_ids );
}
$total_comments = get_comments(
array_merge(
$args,
array(
'count' => true,
'offset' => 0,
'number' => 0,
'orderby' => 'none',
)
)
);
$this->set_pagination_args(
array(
'total_items' => $total_comments,
'per_page' => $comments_per_page,
)
);
}
/**
* @param string $comment_status
* @return int
*/
public function get_per_page( $comment_status = 'all' ) {
$comments_per_page = $this->get_items_per_page( 'edit_comments_per_page' );
/**
* Filters the number of comments listed per page in the comments list table.
*
* @since 2.6.0
*
* @param int $comments_per_page The number of comments to list per page.
* @param string $comment_status The comment status name. Default 'All'.
*/
return apply_filters( 'comments_per_page', $comments_per_page, $comment_status );
}
/**
* @global string $comment_status
*/
public function no_items() {
global $comment_status;
if ( 'moderated' === $comment_status ) {
_e( 'No comments awaiting moderation.' );
} elseif ( 'trash' === $comment_status ) {
_e( 'No comments found in Trash.' );
} else {
_e( 'No comments found.' );
}
}
/**
* @global int $post_id
* @global string $comment_status
* @global string $comment_type
*/
protected function get_views() {
global $post_id, $comment_status, $comment_type;
$status_links = array();
$num_comments = ( $post_id ) ? wp_count_comments( $post_id ) : wp_count_comments();
$statuses = array(
/* translators: %s: Number of comments. */
'all' => _nx_noop(
'All (%s)',
'All (%s)',
'comments'
), // Singular not used.
/* translators: %s: Number of comments. */
'mine' => _nx_noop(
'Mine (%s)',
'Mine (%s)',
'comments'
),
/* translators: %s: Number of comments. */
'moderated' => _nx_noop(
'Pending (%s)',
'Pending (%s)',
'comments'
),
/* translators: %s: Number of comments. */
'approved' => _nx_noop(
'Approved (%s)',
'Approved (%s)',
'comments'
),
/* translators: %s: Number of comments. */
'spam' => _nx_noop(
'Spam (%s)',
'Spam (%s)',
'comments'
),
/* translators: %s: Number of comments. */
'trash' => _nx_noop(
'Trash (%s)',
'Trash (%s)',
'comments'
),
);
if ( ! EMPTY_TRASH_DAYS ) {
unset( $statuses['trash'] );
}
$link = admin_url( 'edit-comments.php' );
if ( ! empty( $comment_type ) && 'all' !== $comment_type ) {
$link = add_query_arg( 'comment_type', $comment_type, $link );
}
foreach ( $statuses as $status => $label ) {
if ( 'mine' === $status ) {
$current_user_id = get_current_user_id();
$num_comments->mine = get_comments(
array(
'post_id' => $post_id ? $post_id : 0,
'user_id' => $current_user_id,
'count' => true,
'orderby' => 'none',
)
);
$link = add_query_arg( 'user_id', $current_user_id, $link );
} else {
$link = remove_query_arg( 'user_id', $link );
}
if ( ! isset( $num_comments->$status ) ) {
$num_comments->$status = 10;
}
$link = add_query_arg( 'comment_status', $status, $link );
if ( $post_id ) {
$link = add_query_arg( 'p', absint( $post_id ), $link );
}
/*
// I toyed with this, but decided against it. Leaving it in here in case anyone thinks it is a good idea. ~ Mark
if ( !empty( $_REQUEST['s'] ) )
$link = add_query_arg( 's', esc_attr( wp_unslash( $_REQUEST['s'] ) ), $link );
*/
$status_links[ $status ] = array(
'url' => esc_url( $link ),
'label' => sprintf(
translate_nooped_plural( $label, $num_comments->$status ),
sprintf(
'%s',
( 'moderated' === $status ) ? 'pending' : $status,
number_format_i18n( $num_comments->$status )
)
),
'current' => $status === $comment_status,
);
}
/**
* Filters the comment status links.
*
* @since 2.5.0
* @since 5.1.0 The 'Mine' link was added.
*
* @param string[] $status_links An associative array of fully-formed comment status links. Includes 'All', 'Mine',
* 'Pending', 'Approved', 'Spam', and 'Trash'.
*/
return apply_filters( 'comment_status_links', $this->get_views_links( $status_links ) );
}
/**
* @global string $comment_status
*
* @return array
*/
protected function get_bulk_actions() {
global $comment_status;
if ( ! current_user_can( 'moderate_comments' ) ) {
return array(); // Return an empty array if the user doesn't have permission
}
$actions = array();
if ( in_array( $comment_status, array( 'all', 'approved' ), true ) ) {
$actions['unapprove'] = __( 'Unapprove' );
}
if ( in_array( $comment_status, array( 'all', 'moderated' ), true ) ) {
$actions['approve'] = __( 'Approve' );
}
if ( in_array( $comment_status, array( 'all', 'moderated', 'approved', 'trash' ), true ) ) {
$actions['spam'] = _x( 'Mark as spam', 'comment' );
}
if ( 'trash' === $comment_status ) {
$actions['untrash'] = __( 'Restore' );
} elseif ( 'spam' === $comment_status ) {
$actions['unspam'] = _x( 'Not spam', 'comment' );
}
if ( in_array( $comment_status, array( 'trash', 'spam' ), true ) || ! EMPTY_TRASH_DAYS ) {
$actions['delete'] = __( 'Delete permanently' );
} else {
$actions['trash'] = __( 'Move to Trash' );
}
return $actions;
}
/**
* @global string $comment_status
* @global string $comment_type
*
* @param string $which
*/
protected function extra_tablenav( $which ) {
global $comment_status, $comment_type;
static $has_items;
if ( ! isset( $has_items ) ) {
$has_items = $this->has_items();
}
echo '
';
if ( 'top' === $which ) {
ob_start();
$this->comment_type_dropdown( $comment_type );
/**
* Fires just before the Filter submit button for comment types.
*
* @since 3.5.0
*/
do_action( 'restrict_manage_comments' );
$output = ob_get_clean();
if ( ! empty( $output ) && $this->has_items() ) {
echo $output;
submit_button( __( 'Filter' ), '', 'filter_action', false, array( 'id' => 'post-query-submit' ) );
}
}
if ( ( 'spam' === $comment_status || 'trash' === $comment_status ) && $has_items
&& current_user_can( 'moderate_comments' )
) {
wp_nonce_field( 'bulk-destroy', '_destroy_nonce' );
$title = ( 'spam' === $comment_status ) ? esc_attr__( 'Empty Spam' ) : esc_attr__( 'Empty Trash' );
submit_button( $title, 'apply', 'delete_all', false );
}
/**
* Fires after the Filter submit button for comment types.
*
* @since 2.5.0
* @since 5.6.0 The `$which` parameter was added.
*
* @param string $comment_status The comment status name. Default 'All'.
* @param string $which The location of the extra table nav markup: Either 'top' or 'bottom'.
*/
do_action( 'manage_comments_nav', $comment_status, $which );
echo '
';
}
/**
* @return string|false
*/
public function current_action() {
if ( isset( $_REQUEST['delete_all'] ) || isset( $_REQUEST['delete_all2'] ) ) {
return 'delete_all';
}
return parent::current_action();
}
/**
* @global int $post_id
*
* @return string[] Array of column titles keyed by their column name.
*/
public function get_columns() {
global $post_id;
$columns = array();
if ( $this->checkbox ) {
$columns['cb'] = '';
}
$columns['author'] = __( 'Author' );
$columns['comment'] = _x( 'Comment', 'column name' );
if ( ! $post_id ) {
/* translators: Column name or table row header. */
$columns['response'] = __( 'In response to' );
}
$columns['date'] = _x( 'Submitted on', 'column name' );
return $columns;
}
/**
* Displays a comment type drop-down for filtering on the Comments list table.
*
* @since 5.5.0
* @since 5.6.0 Renamed from `comment_status_dropdown()` to `comment_type_dropdown()`.
*
* @param string $comment_type The current comment type slug.
*/
protected function comment_type_dropdown( $comment_type ) {
/**
* Filters the comment types shown in the drop-down menu on the Comments list table.
*
* @since 2.7.0
*
* @param string[] $comment_types Array of comment type labels keyed by their name.
*/
$comment_types = apply_filters(
'admin_comment_types_dropdown',
array(
'comment' => __( 'Comments' ),
'pings' => __( 'Pings' ),
)
);
if ( $comment_types && is_array( $comment_types ) ) {
printf(
'',
/* translators: Hidden accessibility text. */
__( 'Filter by comment type' )
);
echo '';
printf( "t%s", __( 'All comment types' ) );
foreach ( $comment_types as $type => $label ) {
if ( get_comments(
array(
'count' => true,
'orderby' => 'none',
'type' => $type,
)
) ) {
printf(
"t%sn",
esc_attr( $type ),
selected( $comment_type, $type, false ),
esc_html( $label )
);
}
}
echo '';
}
}
/**
* @return array
*/
protected function get_sortable_columns() {
return array(
'author' => array( 'comment_author', false, __( 'Author' ), __( 'Table ordered by Comment Author.' ) ),
'response' => array( 'comment_post_ID', false, _x( 'In Response To', 'column name' ), __( 'Table ordered by Post Replied To.' ) ),
'date' => 'comment_date',
);
}
/**
* Gets the name of the default primary column.
*
* @since 4.3.0
*
* @return string Name of the default primary column, in this case, 'comment'.
*/
protected function get_default_primary_column_name() {
return 'comment';
}
/**
* Displays the comments table.
*
* Overrides the parent display() method to render extra comments.
*
* @since 3.1.0
*/
public function display() {
wp_nonce_field( 'fetch-list-' . get_class( $this ), '_ajax_fetch_list_nonce' );
static $has_items;
if ( ! isset( $has_items ) ) {
$has_items = $this->has_items();
if ( $has_items ) {
$this->display_tablenav( 'top' );
}
}
$this->screen->render_screen_reader_content( 'heading_list' );
?>
<table class="wp-list-table get_table_classes() ); ?>">
' .
/* translators: Hidden accessibility text. */
__( 'Ordered by Comment Date, descending.' ) .
'
';
} else {
$this->print_table_description();
}
?>
print_column_headers(); ?>
display_rows_or_placeholder(); ?>
items;
$this->items = $this->extra_items;
$this->display_rows_or_placeholder();
$this->items = $items;
?>
print_column_headers( false ); ?>
display_tablenav( 'bottom' );
}
/**
* @global WP_Post $post Global post object.
* @global WP_Comment $comment Global comment object.
*
* @param WP_Comment $item
*/
public function single_row( $item ) {
global $post, $comment;
// Restores the more descriptive, specific name for use within this method.
$comment = $item;
if ( $comment->comment_post_ID > 0 ) {
$post = get_post( $comment->comment_post_ID );
}
$edit_post_cap = $post ? 'edit_post' : 'edit_posts';
if ( ! current_user_can( $edit_post_cap, $comment->comment_post_ID )
&& ( post_password_required( $comment->comment_post_ID )
|| ! current_user_can( 'read_post', $comment->comment_post_ID ) )
) {
// The user has no access to the post and thus cannot see the comments.
return false;
}
$the_comment_class = wp_get_comment_status( $comment );
if ( ! $the_comment_class ) {
$the_comment_class = '';
}
$the_comment_class = implode( ' ', get_comment_class( $the_comment_class, $comment, $comment->comment_post_ID ) );
$this->user_can = current_user_can( 'edit_comment', $comment->comment_ID );
echo "
comment_ID' class='$the_comment_class'>";
$this->single_row_columns( $comment );
echo "
n";
unset( $GLOBALS['post'], $GLOBALS['comment'] );
}
/**
* Generates and displays row actions links.
*
* @since 4.3.0
* @since 5.9.0 Renamed `$comment` to `$item` to match parent class for PHP 8 named parameter support.
*
* @global string $comment_status Status for the current listed comments.
*
* @param WP_Comment $item The comment object.
* @param string $column_name Current column name.
* @param string $primary Primary column name.
* @return string Row actions output for comments. An empty string
* if the current column is not the primary column,
* or if the current user cannot edit the comment.
*/
protected function handle_row_actions( $item, $column_name, $primary ) {
global $comment_status;
if ( $primary !== $column_name ) {
return '';
}
if ( ! $this->user_can ) {
return '';
}
// Restores the more descriptive, specific name for use within this method.
$comment = $item;
$the_comment_status = wp_get_comment_status( $comment );
$output = '';
$approve_nonce = esc_html( '_wpnonce=' . wp_create_nonce( 'approve-comment_' . $comment->comment_ID ) );
$del_nonce = esc_html( '_wpnonce=' . wp_create_nonce( 'delete-comment_' . $comment->comment_ID ) );
$action_string = 'comment.php?action=%s&c;=' . $comment->comment_ID . '&%s';
$approve_url = sprintf( $action_string, 'approvecomment', $approve_nonce );
$unapprove_url = sprintf( $action_string, 'unapprovecomment', $approve_nonce );
$spam_url = sprintf( $action_string, 'spamcomment', $del_nonce );
$unspam_url = sprintf( $action_string, 'unspamcomment', $del_nonce );
$trash_url = sprintf( $action_string, 'trashcomment', $del_nonce );
$untrash_url = sprintf( $action_string, 'untrashcomment', $del_nonce );
$delete_url = sprintf( $action_string, 'deletecomment', $del_nonce );
// Preorder it: Approve | Reply | Quick Edit | Edit | Spam | Trash.
$actions = array(
'approve' => '',
'unapprove' => '',
'reply' => '',
'quickedit' => '',
'edit' => '',
'spam' => '',
'unspam' => '',
'trash' => '',
'untrash' => '',
'delete' => '',
);
// Not looking at all comments.
if ( $comment_status && 'all' !== $comment_status ) {
if ( 'approved' === $the_comment_status ) {
$actions['unapprove'] = sprintf(
'%s',
esc_url( $unapprove_url ),
"delete:the-comment-list:comment-{$comment->comment_ID}:e7e7d3:action=dim-comment&new=unapproved",
esc_attr__( 'Unapprove this comment' ),
__( 'Unapprove' )
);
} elseif ( 'unapproved' === $the_comment_status ) {
$actions['approve'] = sprintf(
'%s',
esc_url( $approve_url ),
"delete:the-comment-list:comment-{$comment->comment_ID}:e7e7d3:action=dim-comment&new=approved",
esc_attr__( 'Approve this comment' ),
__( 'Approve' )
);
}
} else {
$actions['approve'] = sprintf(
'%s',
esc_url( $approve_url ),
"dim:the-comment-list:comment-{$comment->comment_ID}:unapproved:e7e7d3:e7e7d3:new=approved",
esc_attr__( 'Approve this comment' ),
__( 'Approve' )
);
$actions['unapprove'] = sprintf(
'%s',
esc_url( $unapprove_url ),
"dim:the-comment-list:comment-{$comment->comment_ID}:unapproved:e7e7d3:e7e7d3:new=unapproved",
esc_attr__( 'Unapprove this comment' ),
__( 'Unapprove' )
);
}
if ( 'spam' !== $the_comment_status ) {
$actions['spam'] = sprintf(
'%s',
esc_url( $spam_url ),
"delete:the-comment-list:comment-{$comment->comment_ID}::spam=1",
esc_attr__( 'Mark this comment as spam' ),
/* translators: "Mark as spam" link. */
_x( 'Spam', 'verb' )
);
} elseif ( 'spam' === $the_comment_status ) {
$actions['unspam'] = sprintf(
'%s',
esc_url( $unspam_url ),
"delete:the-comment-list:comment-{$comment->comment_ID}:66cc66:unspam=1",
esc_attr__( 'Restore this comment from the spam' ),
_x( 'Not Spam', 'comment' )
);
}
if ( 'trash' === $the_comment_status ) {
$actions['untrash'] = sprintf(
'%s',
esc_url( $untrash_url ),
"delete:the-comment-list:comment-{$comment->comment_ID}:66cc66:untrash=1",
esc_attr__( 'Restore this comment from the Trash' ),
__( 'Restore' )
);
}
if ( 'spam' === $the_comment_status || 'trash' === $the_comment_status || ! EMPTY_TRASH_DAYS ) {
$actions['delete'] = sprintf(
'%s',
esc_url( $delete_url ),
"delete:the-comment-list:comment-{$comment->comment_ID}::delete=1",
esc_attr__( 'Delete this comment permanently' ),
__( 'Delete Permanently' )
);
} else {
$actions['trash'] = sprintf(
'%s',
esc_url( $trash_url ),
"delete:the-comment-list:comment-{$comment->comment_ID}::trash=1",
esc_attr__( 'Move this comment to the Trash' ),
_x( 'Trash', 'verb' )
);
}
if ( 'spam' !== $the_comment_status && 'trash' !== $the_comment_status ) {
$actions['edit'] = sprintf(
'%s',
"comment.php?action=editcomment&c={$comment->comment_ID}",
esc_attr__( 'Edit this comment' ),
__( 'Edit' )
);
$format = '';
$actions['quickedit'] = sprintf(
$format,
$comment->comment_ID,
$comment->comment_post_ID,
'edit',
'vim-q comment-inline',
esc_attr__( 'Quick edit this comment inline' ),
__( 'Quick Edit' )
);
$actions['reply'] = sprintf(
$format,
$comment->comment_ID,
$comment->comment_post_ID,
'replyto',
'vim-r comment-inline',
esc_attr__( 'Reply to this comment' ),
__( 'Reply' )
);
}
/**
* Filters the action links displayed for each comment in the Comments list table.
*
* @since 2.6.0
*
* @param string[] $actions An array of comment actions. Default actions include:
* 'Approve', 'Unapprove', 'Edit', 'Reply', 'Spam',
* 'Delete', and 'Trash'.
* @param WP_Comment $comment The comment object.
*/
$actions = apply_filters( 'comment_row_actions', array_filter( $actions ), $comment );
$always_visible = false;
$mode = get_user_setting( 'posts_list_mode', 'list' );
if ( 'excerpt' === $mode ) {
$always_visible = true;
}
$output .= '
';
$i = 0;
foreach ( $actions as $action => $link ) {
++$i;
if ( ( ( 'approve' === $action || 'unapprove' === $action ) && 2 === $i )
|| 1 === $i
) {
$separator = '';
} else {
$separator = ' | ';
}
// Reply and quickedit need a hide-if-no-js span when not added with Ajax.
if ( ( 'reply' === $action || 'quickedit' === $action ) && ! wp_doing_ajax() ) {
$action .= ' hide-if-no-js';
} elseif ( ( 'untrash' === $action && 'trash' === $the_comment_status )
|| ( 'unspam' === $action && 'spam' === $the_comment_status )
) {
if ( '1' === get_comment_meta( $comment->comment_ID, '_wp_trash_meta_status', true ) ) {
$action .= ' approve';
} else {
$action .= ' unapprove';
}
}
$output .= "{$separator}{$link}";
}
$output .= '
';
$output .= '';
return $output;
}
/**
* @since 5.9.0 Renamed `$comment` to `$item` to match parent class for PHP 8 named parameter support.
*
* @param WP_Comment $item The comment object.
*/
public function column_cb( $item ) {
// Restores the more descriptive, specific name for use within this method.
$comment = $item;
if ( $this->user_can ) {
?>
<input id="cb-select-comment_ID; ?>" type="checkbox" name="delete_comments[]" value="comment_ID; ?>" />
<label for="cb-select-comment_ID; ?>">
';
$this->column_author( $comment );
echo '